Malicious PDF — malware analysis report

Static analysis result for SHA-256 089e8b741d18c8c8…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 01:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 647746a710abe3e4a8cbaed9bc6a3dcb SHA-1: eb2d2e6467dff4a597e05bb4be46d30c7872ae5c SHA-256: 089e8b741d18c8c8c4fbe5b0a3b47ae53dc9d3504ef7062faf7d65d54828a346
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, luring victims with promises of prizes or funds contingent on a delivery fee. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=how+to+reformat+android+phone+using+pc
    • http://anpharma.net/upload/files/35590533423.pdf
    • http://dpsnowodworze.pl/userfiles/file/ripunimepun.pdf
    • https://alnahamgroup.com/userfiles/file/54518100705.pdf
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fojegaziroderusu.pdf
    • http://alphamarino.kz/images/news/file/19319227408.pdf
    • http://lepetitjaunais.com/userfiles/file/kodikosamadu.pdf
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/20358352164.pdf
    • http://thrifthelp.com/flash/thrifthelp.com/file/raroti.pdf
    • http://huile-de-nigelle.info/userfiles/file/josopetutoxikoxu.pdf
    • http://importfoodfair.com/userfiles/image/2021/09/file/61707590702.pdf
    • https://www.rapn.ru/ckfinder/userfiles/files/bewebofajegunol.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c4d20ee96---22942875890.pdf
    • https://olivermilk.vn/tctt/sites/aaa/file/40062341214.pdf
    • http://amirmazandaranihospital.com/ckeditor/files/files/40278281626.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/46579626989.pdf
    • https://baxsporthorses.nl/userfiles/file/18133271562.pdf
    • https://www.pessin-location.fr/ckfinder/userfiles/files/53967428876.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416876d52f7---wosopevejo.pdf
    • http://aaz.sk/editor_uploads/files/15047379862.pdf
    • http://inwallendorf.de/userfiles/file/72748916253.pdf
    • https://kentacademymiango.com/userfiles/file/86630854490.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61d.bin
130a70d4dbf24b0e867ca85186469562b1f0504b5c2ad8e25937e0a19a9539f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 11200 bytes
font_01_sfnt_off0000fff4.bin
79b41bf178b06a5df84f642ad25fa94329d8c4023cabffb945f26518ac9d0f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 17620 bytes
font_02_sfnt_off00012e0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0A 16792 bytes

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